Brain App for Mac
is a free application that gives you math problems to solve quickly to test your brain power.
Research has proven that exercising the mind with simple math problems is a strong benefit for memory retention and fast recall. With this game, you will be able to improve your cognitive function as well as have fun.
The game has three levels of questions: easy, advanced, and genius. Further, you can set the challenge for 30- or 60-second increments. You can even start in practice mode to get started.
This version offers access to some of the game's full features, with the full version costing $1.99.